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24330d27 | 1 | /* |
4bd4418a | 2 | * $RCSId: $ |
24330d27 | 3 | * |
46b51147 | 4 | * Copyright © 2000 Tuomas J. Lukka |
24330d27 KP |
5 | * |
6 | * Permission to use, copy, modify, distribute, and sell this software and its | |
7 | * documentation for any purpose is hereby granted without fee, provided that | |
8 | * the above copyright notice appear in all copies and that both that | |
9 | * copyright notice and this permission notice appear in supporting | |
10 | * documentation, and that the name of Tuomas Lukka not be used in | |
11 | * advertising or publicity pertaining to distribution of the software without | |
12 | * specific, written prior permission. Tuomas Lukka makes no | |
13 | * representations about the suitability of this software for any purpose. It | |
14 | * is provided "as is" without express or implied warranty. | |
15 | * | |
16 | * TUOMAS LUKKA DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, | |
17 | * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO | |
18 | * EVENT SHALL TUOMAS LUKKA BE LIABLE FOR ANY SPECIAL, INDIRECT OR | |
19 | * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, | |
20 | * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER | |
21 | * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR | |
22 | * PERFORMANCE OF THIS SOFTWARE. | |
23 | */ | |
24 | ||
25 | #include <math.h> | |
26 | #include <stdlib.h> | |
27 | #include <ctype.h> | |
212c9f43 | 28 | #include <sys/mman.h> |
24330d27 KP |
29 | #include "fcint.h" |
30 | ||
cd2ec1a9 PL |
31 | FcMatrix _id = { 1, 0, 0, 1 }; |
32 | const FcMatrixPtr FcIdentityMatrix = { | |
33 | .storage = FcStorageDynamic, | |
34 | .u.dyn = &_id | |
35 | }; | |
327a7fd4 | 36 | |
24330d27 KP |
37 | FcMatrix * |
38 | FcMatrixCopy (const FcMatrix *mat) | |
39 | { | |
40 | FcMatrix *r; | |
41 | if(!mat) | |
42 | return 0; | |
43 | r = (FcMatrix *) malloc (sizeof (*r) ); | |
44 | if (!r) | |
45 | return 0; | |
46 | FcMemAlloc (FC_MEM_MATRIX, sizeof (FcMatrix)); | |
47 | *r = *mat; | |
48 | return r; | |
49 | } | |
50 | ||
cd2ec1a9 PL |
51 | void |
52 | FcMatrixPtrDestroy (FcMatrixPtr mi) | |
53 | { | |
54 | if (mi.storage == FcStorageDynamic) | |
55 | FcMatrixFree (mi.u.dyn); | |
56 | } | |
57 | ||
24330d27 KP |
58 | void |
59 | FcMatrixFree (FcMatrix *mat) | |
60 | { | |
cd2ec1a9 | 61 | if (mat != FcMatrixPtrU(FcIdentityMatrix)) |
327a7fd4 KP |
62 | { |
63 | FcMemFree (FC_MEM_MATRIX, sizeof (FcMatrix)); | |
64 | free (mat); | |
65 | } | |
24330d27 KP |
66 | } |
67 | ||
68 | FcBool | |
69 | FcMatrixEqual (const FcMatrix *mat1, const FcMatrix *mat2) | |
70 | { | |
71 | if(mat1 == mat2) return FcTrue; | |
72 | if(mat1 == 0 || mat2 == 0) return FcFalse; | |
73 | return mat1->xx == mat2->xx && | |
74 | mat1->xy == mat2->xy && | |
75 | mat1->yx == mat2->yx && | |
76 | mat1->yy == mat2->yy; | |
77 | } | |
78 | ||
79 | void | |
80 | FcMatrixMultiply (FcMatrix *result, const FcMatrix *a, const FcMatrix *b) | |
81 | { | |
82 | FcMatrix r; | |
83 | ||
84 | r.xx = a->xx * b->xx + a->xy * b->yx; | |
85 | r.xy = a->xx * b->xy + a->xy * b->yy; | |
86 | r.yx = a->yx * b->xx + a->yy * b->yx; | |
87 | r.yy = a->yx * b->xy + a->yy * b->yy; | |
88 | *result = r; | |
89 | } | |
90 | ||
91 | void | |
92 | FcMatrixRotate (FcMatrix *m, double c, double s) | |
93 | { | |
94 | FcMatrix r; | |
95 | ||
96 | /* | |
97 | * X Coordinate system is upside down, swap to make | |
98 | * rotations counterclockwise | |
99 | */ | |
100 | r.xx = c; | |
101 | r.xy = -s; | |
102 | r.yx = s; | |
103 | r.yy = c; | |
104 | FcMatrixMultiply (m, &r, m); | |
105 | } | |
106 | ||
107 | void | |
108 | FcMatrixScale (FcMatrix *m, double sx, double sy) | |
109 | { | |
110 | FcMatrix r; | |
111 | ||
112 | r.xx = sx; | |
113 | r.xy = 0; | |
114 | r.yx = 0; | |
115 | r.yy = sy; | |
116 | FcMatrixMultiply (m, &r, m); | |
117 | } | |
118 | ||
119 | void | |
120 | FcMatrixShear (FcMatrix *m, double sh, double sv) | |
121 | { | |
122 | FcMatrix r; | |
123 | ||
124 | r.xx = 1; | |
125 | r.xy = sh; | |
126 | r.yx = sv; | |
127 | r.yy = 1; | |
128 | FcMatrixMultiply (m, &r, m); | |
129 | } | |
cd2ec1a9 PL |
130 | |
131 | static FcMatrix * matrices = 0; | |
132 | static int matrix_ptr = 0, matrix_count = 0; | |
133 | ||
134 | void | |
135 | FcMatrixClearStatic (void) | |
136 | { | |
137 | matrices = 0; | |
138 | matrix_ptr = 0; | |
139 | matrix_count = 0; | |
140 | } | |
141 | ||
142 | FcMatrix * | |
143 | FcMatrixPtrU (FcMatrixPtr mi) | |
144 | { | |
145 | switch (mi.storage) | |
146 | { | |
147 | case FcStorageDynamic: | |
148 | return mi.u.dyn; | |
149 | case FcStorageStatic: | |
150 | return &matrices[mi.u.stat]; | |
151 | default: | |
152 | return 0; | |
153 | ||
154 | } | |
155 | } | |
156 | ||
157 | FcMatrixPtr | |
158 | FcMatrixPtrCreateDynamic (FcMatrix *mi) | |
159 | { | |
160 | FcMatrixPtr new; | |
161 | new.storage = FcStorageDynamic; | |
162 | new.u.dyn = mi; | |
163 | return new; | |
164 | } | |
165 | ||
166 | FcBool | |
167 | FcMatrixPrepareSerialize(FcMatrix *m) | |
168 | { | |
169 | matrix_count++; | |
170 | return FcTrue; | |
171 | } | |
172 | ||
173 | FcMatrixPtr | |
174 | FcMatrixSerialize(FcMatrix *m) | |
175 | { | |
176 | FcMatrixPtr new; | |
177 | ||
178 | if (matrix_count == matrix_ptr) | |
179 | return FcMatrixPtrCreateDynamic(0); | |
180 | ||
181 | new.storage = FcStorageStatic; | |
182 | new.u.stat = matrix_ptr++; | |
183 | return new; | |
184 | } | |
185 | ||
212c9f43 PL |
186 | FcBool |
187 | FcMatrixRead (int fd, FcCache metadata) | |
188 | { | |
189 | matrices = mmap(NULL, | |
190 | metadata.matrices_length * sizeof (FcMatrix), | |
191 | PROT_READ, | |
192 | MAP_SHARED, fd, metadata.matrices_offset); | |
193 | if (matrices == MAP_FAILED) | |
194 | return FcFalse; | |
195 | ||
196 | matrix_count = matrix_ptr = metadata.matrices_length; | |
197 | return FcTrue; | |
198 | } | |
199 | ||
200 | FcBool | |
201 | FcMatrixWrite (int fd, FcCache *metadata) | |
202 | { | |
203 | metadata->matrices_length = matrix_ptr; | |
204 | metadata->matrices_offset = FcCacheNextOffset(fd); | |
205 | ||
206 | if (matrix_ptr > 0) | |
207 | { | |
208 | lseek(fd, metadata->matrices_offset, SEEK_SET); | |
209 | return write(fd, matrices, | |
210 | metadata->matrices_length * sizeof(FcMatrix)) != -1; | |
211 | } | |
212 | return FcTrue; | |
213 | } |